PAM (PAM) needs to be dissolved into a liquid, and the PAM solution often has a viscosity drop and a reduced flocculation effect during use, which affects the use effect. There are several reasons for the end.

1: Storage time:

As the storage time of the PAM solution increases, the more the degradation, the lower the viscosity, and the worse the flocculation effect. In general, the anionic PAM solution can be stored for seven days and the cationic PAM solution can be stored for 24 hours. This is due to the hydrolysis of the amide group and the increase in the hydroxyl content. In particular, the influence of the cationic group is more pronounced, and the removal of the NH3 to form an imide group by the amide group is caused by an increase in the rigidity of the molecular chain.

2: Temperature effect:

In the 0.1% PAM solution, when the temperature reaches 80-90 ¡ã C, the molecular weight of 18 million will degrade to about 5 million in 2-4 hours. As the temperature increases, the degradation becomes faster and faster. Stable at room temperature 25 ¡ã C.

3: Mechanical effects:

Stirring can increase the dissolution rate of PAM dry powder. The high-strength stirring speed will cut the molecular chain of PAM. It is recommended that the stirring speed be controlled at an online speed of 60 rpm. Do not use high-strength mixing equipment and high-speed conveying equipment.

4 effects of lighting:

The light will increase the temperature, so that the PAM dissolves and degrades, and the direct irradiation of ultraviolet light causes the dissolution to degrade rapidly. Direct light for 3-5 hours under strong light will reduce the molecular weight of pam by 30--50%.

5: The effect of impurities:

Dissolve PAM dry powder, preferably use neutral water, water hardness, or contain impurities, will affect the viscosity and use of PAM.